[ Modal Verbs ]
You ___ be careful while handling chemicals in the lab.
A. can
B. must
C. may
D. might

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Perfect TenseTOEFL GrammarLinking Words and ConjunctionSimple, Compound, Complex SentencesTime ConjunctionsModals AuxiliaryQuantifiers: too many, too much & enoughGerund NounQuantifies and Modals of DeductionPast Simple and ContinuousOther quiz:
Quantifiers / Prepositions of Time and Comparative Adjectives › ViewThis is the ______ poem I have ever written.
A. best
B. better
C. good
D. most good
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Grandfather isn’t feeling well. He ____ the doctor later today.
A. ‘s seeing
B. sees